Cathepsin LCathepsinsCathepsin BCathepsin KCysteine EndopeptidasesLysosomesCathepsin CCystatinsCysteine Proteinase InhibitorsCysteine ProteasesCathepsin DCathepsin HCathepsin GEndopeptidasesCystatin MCysteineMice, KnockoutCathepsin ECathepsin FProtease InhibitorsAmino Acid SequenceMolecular Sequence DataPepstatinsEnzyme PrecursorsSerine EndopeptidasesPeptide HydrolasesPapainLeucineHydrogen-Ion ConcentrationSubstrate SpecificityLeukocyte ElastaseCathepsin ZRecombinant ProteinsCells, CulturedCalpainHIV ProteaseKineticsCathepsin WEnzyme Activation